Study guide

Question 1

Physical change and examples

Answer 1

The ability for something to change but can retract to their physical form
Examples- Boiling point, color, hardness

Question 2

Chemical change and examples

Answer 2

The chemical composition of the substance changes
Examples - Reactivity other chemicals, flammability, will rust

Question 3

Atom

Answer 3

The basic particles of the chemical elements

Question 4

Element

Answer 4

Composed of atoms, that cannot be broken down into simpler substances by chemical means

Question 5

Compound

Answer 5

A thing that is composed of two or more separate elements

Question 6

Diatomic molecules

Answer 6

Molecules that contain only two atoms bonded to one another

Question 7

Mixture

Answer 7

Two or more substances that are mixed together but not chemically combined

Question 8

Pure substance

Answer 8

A single substance made of only one type of particle

Question 9

What’s the formula to find the error percentage

Answer 9

l # of experimental density - Actually D l
divided by actual density times 100

Question 10

What’s the difference between prescription and accuracy

Answer 10

Accuracy means perfect or almost on point every time and precision is when its around the same point